Charles w



C. w. BARNABY.

TYPE WRITER. APPLICATION man MAY I9, 19H.

Patented July l, 1919.

Fig. a

` A TTORNE Ys.

CHARLES W. BARNABY. F NEW YORK, N. Y.

TYPE-WRITER.

Speccation of Letters Patent.

Patented July 1 1919.

Application illed` May 19, 1917. Serial No. 169,676.

To all whom 'it 'may concern.:

Bc it known that l, CHARLES W. BAR- Nani.y a citizen of the UnitedStates, and resident ot' the borough of Riclnnond, county. of Richmond.city and State ot' New York, have invented certain new and usefulImprovements in Typewriters, of which the following is a specification.

My invention relates to the feed mechanism of typewriting machines andthe primary object of my invention is to provide improved mechanism ofsimple and compact form- The present application in cludcs certain partsoriginally claimed in my copcnding application. Serial No. 112,- 951,filed August 3, 1916. The present aps plication also discloses in partcertain features claimed in my copending applications. Serial Nos.273.865 and 273.866, filed Jannary 29th, 1919.

Figure 1 is a front view of the feed mech-- anism, carriage, platen andauxiliary frame in which the carriage is mounted. the forward extensionsof thc auxiliary frame being cut away;

Fig. 2 is a section of Fig. l taken at ay right. angle to that figureand approximately on the line Am-T of Fig. 1, A sec tion of a part ofthe main frame is also shown in this figure on approximately the sameline, AMB. Also a 4tuition through the center of the type-bar action anduniversal bar;

Figs. 3, 4, 5 and 6 are capement action;

Fig. 7 is an axial section through the deans ef an esmain apringlf` mainSpring T easing,` carriage driving gear wheel and spring adjustingmechanism;

Fig. 8 is a front rien' of portions of the escapcment mechanismillustrating a modification in the manner of applyingr the same;

Fig. 9 is a vertical section through the center of driving gear andrack. the gear boing partly broken away to better show esca ienmntparts.

Flic platen l is miatively mounted in carriage El' and the carria e isreciprocably mounted on wheel 3 anv hearing-f balle -l which engagetracks .arming a part of auxiliary frame 5. 'the auxiliary frame isreciprocably mounted in main frame 6 by means of a pair of links 7 ateach side of the frames, the linlrs'being pivoted at the top of thesides ot' the main frame at 8 and to the bottom of the sides of theauxiliary frame at 9. Any suitable case shift device may be used to givethe auxiliary frame its proper movement. in a direction at a right anglewith the axis of the platen, to bring one or the other of type 10 ontype-bar 11 into proper printing relation with the platen when thctype-bar is thrown to printing position when in dotted outline 11.

The typedmr is operated by kur l2 attached to lever 13 pivoteol to mainframe at 14. A link 15 connects the key lever with lever 16 pivoted at17 to an upper cross member 18 of the main frame. Lever 1G is pivoted at19 to link 2O which in turn is pivoted at 2l to a lug formingr a part 0ftype-bar 1l. The type-bar action shown on the drawings constitutes apart of the subject matter of my copending application Ser. No. 128,298.filed (')ctober 28. 1,916. A toothed rack 9.2 runs the whole length ofthe carriznire` shown broken away in Fig. 1. and is engaged by thedriving gear 23. To the gear is attached spring case 24 and both arepivoted freely on a shaft which has a pivot 27 at om` ond journaled ina` lug 5 on auxiliary frame 5 and a pivot 26 at the other end which isjournaled in bearing bracket Q8, the bracket being rigidly secured toauxiliary trame by two studs Q9. A vibrating bar 30 has an upwardlyextending arm. one branch 32 carrying the escapement dogs and anotherbranch 33 engaping an opening;` in ribbon vibrator 34, which ispivotedat 35 to a top bracket 36 of auxiliary frame Two arms 37 extend forwardfrom vibrating bar 30 carrying pawls 3S for operating ribbon s ls (notshown) also carrying two Whees 39 which engage shelves 40 formed onupright members 41 of the universal bar 42. The lower. or normalposition of the uni versal bar is determined b v its feet 43 comA im: incontact withlloor. 6' of the main li (l frame. Springs 44 connected witharms 37 and floor of the main frame, hold vibratin bar 30 and its armsin normal position wlth` wheels 39 resting on shelves 40 of theuniversal bar, therefore any upward movement of the universal bar,causes movement of the vibrating bar and its arms.

The universal bar is constrained to an 4approximately vertical movementby a pair of parallel links ivoted at one of their ends to each of theupright members 41 of universal' bar, the other end of each link ivotedto standards 45 extending from oor 6 of main frame to upper cross member18 of main frame, one being placed near each upright member 41 of theuniversal bar 42. u

Space-bare? extends along the front of the keyboard and connects withtwo space levers 48 pivoted at 49 and engaging at theirinner `ends theunder side of shelves 40 `of the universal bar. Therefore when space bar47 is pressed downward the universal ber 42 is raised to dotted position42. At the same time wheels 39 on the arms 37 of vibrating bar 30 areraised to dotted position B9 throwing the Iarm 32 toward the platen andputting the escape ment into action as explained farther on.

Type-bar 11 is held in normal 6 of the main frame. The upper end of the4spring is connected to a hook member 5l which engages a pivot at 52 onlink 20. When thewriting action is put in operation and type-'bar 11swings toward printing position, spring hook 51 swings into and engagesthe inverted trough of universal bar 42, carrying it up to the dottedposition. 42.

-thus putting the vibrating bar and its en- -worm 56 journaled in lugsattached to bear ing bracket 28. The main spring is thereby adjusted tothe required tension. 'The spring acts through the drivin gear .to forcethe rack in the direction indgicated by the arrow on the rack, Fig. 1.

Normally, as shown in Figs. 1 and 3, the driving gear is held againstrotating by the dog or fillet 57 pivoted at 58 to dog carrier 59 vvhicin turn 1s pivoted at 60 to vibratin arm 82. Dog or pallet 57 is forcedhar against stop screw 61 attached to dog carrier 59, the carrier itselfrestinghard a einst pin 62 attached to vibrating arm 32, us holdositionl Vby spring 50 which isanchored to t e .floor ing the driving geur in afixed position. J aw (53, as well as jaw 64 when the latter is employed,is forward of and out of engagement with the tceth when in this normalposition.

When the escapcmcnt is put into action by thc upward movement of whccl3.) attached to arm 57 of vibrating, or rockin bar 30, escapemcnt urin32 is thrown from its outer, or normal position 32 to its` innerposition 32', Fig. L In moving to this inner position jan' (53 passesinto the tooth space with which it. was in line in normal position,thus' holding the ruck and carriage in the saine fixed position untilthe inner stroke is completed. `In this inner position dog or pallet 57has passed to the rear of and out of engagement with driving gear '23.Having passed out of tooth space 65, Fig. 5, the dog or pallet is freeto take its lown normal position against Stop screw (S7 through theaction of spring 6H. The Iaction spring 69 tendel to hold dog carrier 59(removed in Fig. 5 to better show said dog or pallet and its spring andstops) in its normal position against stop pin 0&2. In its new position,dog 5T, Fig-Vi. is back of and in line with tooth space 6G, the nextspace beyond 65 which it had previously occupied. When dogv arm 32retnrns'to its normal position 32, Fig. 4, dog 57 enters tooth space 66.Fig. 5, before jaw 63 leaves its tooth space in the rack. As ysoon asjaw 63 has lcftst-he rack, the main spring, which predominates over theweak dog spring G8, throws the driving gear ahead until dog 57 strikesstop screw (S1, which brings the parts again to the Fig. 3 ris-lation.except that driving gear, rack and carriage have advanced one tooth.

Fig. S shows a modification in thc appliration of my escapernent inwhich the vibrating dog 5T engages the teeth of the rack in stead of theteeth of the driving gear and the fixed jaw 78 attached to vibrating arm32 engages the teeth oi driving gear 23 instead of engaging theteeth ofthe rack. Otherwise the application and operation' of the escapement isthc saine as the application shown in Figs. 3, 4, 5. G. Normally (seeFigs. H and 9), vibrating arm 32 is in its forward position with dog 57in engagement. with the rack teeth and with an' 78 forward ot und ont ofengagement with the driving geur. As arm 32 moves to its backwardposition jaw 78 lil-st enters its too'th space in the geur, and later,just before arm 32 reaches. its cxtreme back position, dog 57 passesback of and clear of rack 22 and through the action of the spring coiledaround its shank is thrown back to position 57 against stop screw 67 inline with the next tooth space, the same as in Fig. 5, Where dog 57 hasdropped u tooth space back from the position it occupied in F ig. 3.When arm 32, Fig. 8, moves forward to its normal position the dog moveswell into the tooth space at 57 before jaw 78 passes out of engagementwith the gear, so that as quickly as jaw 7 8 is clear of the gear themain spring acts throughithe gear to drive the rack forward in thedirection indicated by the a1- row, throwing the dog forward fromdotted.

- lar operation of themachine, l prefer to use it as a matter of safety,particularly when the carriage with rack attached is adapted to beeasily removed from the machine. For illustration, take Fig. 3 which hasno extra jaw 64. Being in normal position with jaw 63 out of engagementand dog 57 locking the driving gear against turning, it is obvious thatrack 2:2 may be lifted from engage ment with the driving gear withimpunity as long as the escapement mechanism is not disturbed, but, ifthe escapement is put into action through accidental or thoughtlessoperation of the space bar or a type key, dog 57 would be thrown out ofengagement with the driving gear and the main spring would unwind in aninstant. Referring to Fig. 5, if the extra jaw 64 is provided and theescapement put in operation to throw dog 57 out of engagement with thedrivin gear at a time when the rack 22 is remove jaw 64 will haveentered into engagement with a driving gear tooth, holding the drivinggear in posltion. When the escapement mechanism returns to normalposition the driving gear will merely advance one tooth the same asthough the rack was in place.

'lo more thc' carriage to the right it is oni)r necessary to push handle70. which is rigidly attached to the carriage. in the directionindicated by the arrow atthat point. As the carriage starts backward dog57 follows thc tooth space in which it was situated until it arrives atosition 57 in contact with stop Screw 67, ig. 5. As the carriage movesstill. farther backward the gear tooth pressure against said dog 57causes its carrier 59 to swing on its pivot 60 so as to allow the dog toslide over the top of the tooth as :lhown in Fig. 6. The carriage maythus bc pushed backward to anydesired position.

The hack spacing mechanism consists of the back spacckey 7l attached tolever 72 which is pivoted at 73 to the floor of the main tramo the levercarrying at its inner end the jaw 7l which hooks under roller 75. Thisroller is attached to lever 76 which is pivoted on stud 29. An arm 77 oflaver 76 oxftends backward under stud 29 and then upward. This arm isalso pivoted on stud 29 and carries at its upper end the back spacingpawl 79. Sming S0 acts to throw the jaw end of the pawl upward but inthe normal position of the hack spacing mechanism, pawl 7S) is well outof engagcment with dri ving gear Q4. in which position the tail of pawl79 rests on arm S1. extending` backward from bearing bracket 28, andthus preventing spring 8O from throwing the jaw of pawl 79 above itsnormal position.

lVhen the back space kcy is pressed down, roller 75 is thrown upward to75 (sce Fig. 1). As levcr 76, to which this roller is attachcd, movesupward. paw] 79 is thrown toward driving gear Q8 and the tail of thepawl resting on arm 8l guides the jaw of the pawl into tooth spaceReferring to Fig. 6, dot 83 represents the center of back space pawlpivot in normal position scc Fig. l). 84 is the ccutcr of pawl pivotwhcu said paw] is in dotted position 79 and has just entered tooth spaceS2. As the pawl pivot. advances still farther to S5. tooth space 82 isturned backward to SQ. thc escapement dog 57 during this time havingturned first on its own pivot and then on pivot 60 of its carrier andleft tooth space 66. now rests on the top of a tooth ready to drop intotooth space when the driving gear is turned slightly farther backward hvthe back space pawl upon thc arrival of the back spacing mechanism atthe limit of its movement. When pressure is removed from the back spacekey the back spacing mechanism is returned to its normal positionthrough the action of spring 86, one end of which cngages bearingbracket 28 and thc other ond of which engages thc upright part of arm77.

The release bar 87 (scc Fig. l) throws the escapement ont ot action whenit is desired to move the carriage toward the lcft independently of theaction of thc cscapcment. The release bar is hung at omI cnil on shortarm SS of lever S9 which swings on pivot 9() which is rigidlyl connectedwith the carriage. the other end of the release liar being hung on link91 pivoted to thc carriage at 92. A'

small rollcr 93 is mounted dircctlv under release bar S7 upon ancxtcusion of thc stud for stop scrcw 6l. This stud is allachcd toescafwment dog carrier 59. Th:` release is operated by seizing carriagehandle 7l) and lever tlfl between fingcr and thumb which are squeezedtogether to bring the lcver to position 89. handle 70 at the sauzc thm`bcing pressed in the direction of ihr` arrow to move the carriageslightly to thc` right. This operation throws thc bottom ol' rclcasc barto position shown by dotted liuc 87' and roller 9?' is thereby presseddownward. throwing dog carrier 59 slightly lower than in Fig. 6 so thatescapement dog 57 is clear of the teeth of the driving gear. Theescapement is thus thrown entircl)`| out of engagement' and as long asthe handle and lever are held together between finger and thumb theearriage may be moved forward or backward to any desired position. W'hcnthe carriage is in the desired position. thumb and finger are spreadapart. allowing the lever to return to position Si! through the actionot spring Ell and allowing the eseapemcnt do to return to its engagingrelation with t e driving gear.

Interlocking elements are introduced into the mechanism of the escapement and of the back spacer which prevent either from lie-infr putinto motion after thc olher has started into action. .\rm 95 (see Figs.l and 2), extends upward and `slightly backward from back space leverT6. its front face being slightly back of the rear face of the 96portion of escapeinenl arm 3L. Then the back spacing mechanism is putinto action it only gets slightlyV started in its movement before arm 95passes behind wall 96 of escapement arm 32, thus` preventing theescapement arm from moving backward which would lock the escapementmechanism against action. If the eseapemcnt mechanism is put into actionfirst, the slightest movement ot' arm 3Q brings the edge of wall 96 intothe path o movement of back space lever arm 95, thus elicctuall;Ylocking the back spacing mechanism against operation until theescapement mechanism has returned to its normal position.

Another interlocking clement is introduced which prevents either one otthe escapement or release mechanisms being put into action after theother has started to act. An arm 9T extends backward from the jaw end ofesca. ement arm 32. The eX- treme bark end o arm 97 is just forward ofrelease bar S7 and its top edge is just below the lower edge ol therelease bar, when both are in no1-mal position. When the escapement hasbarel)7 started in motion arm 97 has started ander the release bar, thuslocking it against action and when the release is put into action first.release bar 87 only moves slightly before it has passed downward behindarm 9T, thus preventing the movement of escapement arm 32 backward andlocking the cscapement inecbanlsm against action.

l claim:

,1. ln a typewriter, the combination with a reciprocable carriageprovided with a rack, of escapement mechanism comprising apinion'mcshing with said rack, said pinion being power driven, avibratory lever provided with a double-jawed dog, the jaws of said dogbeing adapted by the movement ot Said vibratori*- lever to move into andout of positions respectively between adjacent teeth of said rack andbetween adjacent teeth ot said pinion, and a vibratory dog movable intoand ont ol' engagement with said pinion.

1%, ln a typewriter, the combination with :l rerprmfable carriageprovided with a rack, ol a pinion meshing with said rack` means fordriving said rack blv means of said pinion, and means l'or permitting atooth by Aooth escapement ot said pinion. said esrapement meansincluding a vibratorv arm carrying a dog with jaws For refniectiveliYengaging in said rack and pinion and a pawl which vibral'es relativelvto said dog for engaging said pinion. i

3. ln a typewriter, the combination with a reciprocable carriageprovided with a rack, of a pinion meshing with said rack, means t'ordriving said rack bv means of said pinion, and means for permitting atooth b v tooth escapenient of said pinion. said escapement meansincluding a` vibratory arm carrying a dog with jaws for respectivelyengaging in said rack and pinion and a paw] which vibrates relatively tosaid dog for engaging .said pinion, and a` vibratorv arm which carriessaid dog and pawl.

L ln a typewriter, the combination with a reciproeable carriage providedwith a rack, ol" a pinion meshing with said rack, means for driving saidrack by means of said pinion. and nieans for permitting a toiith bytooth escapinent o'tl said pinion. said escapement means including avibrating arm carrying an element adapted to engage and release saidracl` and a second element adapted to release and engage said pinion,one of said engaging elements being adapted to viY hrate relatively tosaid vibrating arm.

In a tvpewriter escapement, a rack. a gear meshing with `said rack, apallet engag ing' said rack. another pallet engaging said gear, one ofsaid pallets being vieidably mounted to perinit a backward movement andmeans for alternately moving said pallets into and out of engagementwith said rack and gear respectively, the eseapement movement of saidvieldablv mounted pallet being independent of the vieldable move ment ofits, mount.

ti. ln a typewriter, an eseapenieiit mech` anism including a carriagedriving gear. a vibratory arm. a dog carrier pivotallv mounted on saidvibratorv arm. a dog pivotalllv mounted on said dog carrier and eingaging said gear, and means for limiting' the pivotal movement ot' saiddog carrier in the direction of the driving movement of said gear.

7. ln a typewriter escapcment, a rack, a driving gear in engagement withsaid rack, and means for permitting a tooth by tooth eseapement of i:aidrack and driving gear, said cscapement means including a jaw fictingupon said rack, a vibrating dog acting upon said driving gearalternately with said jaw, and an auxiliary jaw acting upon the drivinggear in unison with the action of the rack engaging jaw, whereby acomplete escapement action is effected upon the driving gear when therack is removed.

8. In a typewriter, the combination with a vibrating escapement meanswhich includes an engagement dog, of an escapenient release meansincluding a portion which is normally in close corner to corner relationwith and has a movement transverse to the movement of said engagementdog, said dog and escapement release means portion being so related thatthe starting of the es capement means upon its movement blocks saidrelease means against movement until said escapement means has returnedto normal position, and the starting of said release means upon itsmovement blocks said escapement means against movement until saidrelease means has returned to normal position.

9. In a typewriter, the combination with a vibrating escapement meanswhich includes au engagement portion, of a back spacing means whichincludes` an engagement dog which is normally in close corner to cornerrelation With and has a movement transverse to the movement of saidengagement portion of the escapement, means, said escapement meansengagement portion and back spacer engagement dog being so related thatthe starting oi' the escapement means upon its movement blocks said backspacing means against movement until said escapement means has returnedto normal position, and the starting of said back spacing means upon itsmovement blocks Said escapernent means against movement until `said backspacing means has returned to normal position.

10. In a typewriter, an escapement arm and a release bar havingtransverse movements relative to each other, said release bar andescapement arm being provided with means ada ting them to coperate witheach other in t e respective directions of their movenients,`so thatwhen either is started on its movement the other is blocked frommovement.

11. In a typewriter, an escapement arm and a back s acing arm havingtransverse movements re ative to each other, and an interlocking portionattached to each of said arms in such positions that the engaging facesof said interlocking portions are normally in close corner to cornerrelation with each other in the respective directions of theirmovements, so that when either is started on its movement the other isblocked against movement.

12. In a typewriter, the combination with a vibratory escapement, ofescapement re- 13. In a typewriter, the combination of escapement meansand'back spacing meansl -having interlocking elements cooperating'between said escapement means and back spacing means to prevent one ofsaid means being operated after an initial movement of the other saidmeans has taken place.

14. In a typewriter, the combination with a reciprocable carriage, ofcarriage escapement means, and means for releasing said escapementmeans, said escapemeut means and escapement release means havingcooperating parts which prevent the operation of either of siid means bythe movement `of the other said means.

15. In a typewriter, the combination with a reciprocable carriage, ofcarriage escapement means, means for releasing said escapenient means,and hack-spaci1ig'-means, said carriage escapement means andescapementrelease means having interengaging elements cooperatingr toprevent the operation of either of said means after an initial movementof the other of said means, and said escapement means and back-spacingmeans having intel-engaging elements to prevent simultaneous operationthereof.

, 16. In a ty ewriter, a reciprocable carriage providedpwith a rack, adriving gear meshin with said rack, means for releasing said rac fromsaid driving gear, and escapement means operating on said gear, saidrack-releasing means and said escapement means having coperative partswhich prevent the operation of either of said means after the operationof the other of said means has been initiated.

17. In a typewriter, a reciprocable carriage provided with a rack, agear meshing with said rack, means for driving said gear, escapementmeans operating on said gear. and back-spacing means operative on saidgear, said escapement means and hack-spacing means having parts adaptedto coperate in' preventing the simultaneous operation of both of saidmeans when either is actuated.

18. In a typewriter, a reciprocable carriage provided with a rack, agear meshing with said rack. means for driving said gear. means forreleasing said rack from, said gear, escapement means operating on saidgear, said releasing means and escapement means cooperating to preventtheir simultaneous operation when an initial movement has been impartedto either, and back-specing means, said escapement means and bink-.ep-living menus eopelating to prevent the simultaneous operation ofescupementmean,` and bucivspucing means after an initial movement hasbeen imparted to either.

19. In a typewriter the combination with :L recprocable carriage, of anescapement mechanism therefor including a, carriage. drive gear, a dogcarrier oscillahable about an axis, a dog osciliatable on seid dogcarrier about an exis parallel to the pivotal exis of said dog carrier,said dog engaging said gear and adapted by the pivotal movementsof saiddog and dog carrier tu permit a` `return movement of said carriage, undmeans for vibrating said dog and dog Carrier iaterally with respect tosaid gear for permitting the escapement of said oariiuge, said vibratingmeans being adapted to limit the esoapement for euch actuation of saidvibrating means.

CHARLES W. BARNABY.

